Need help understanding Dual Blade jobs.....?

When I look at www (dot) basilmarket.com/MapleStory-Skills.html it lists dual blade as a rogue and shows second job as Blade Recruit and Blade Acolyte, third as Blade Specialist and Blade Lord, and Fourth as Blade Master...

and

When I look here: www (dot) basilmarket.com/MapleStory-Guide-Ultimate-Dual-Blade-guide-314.html it lists 2nd job as Dualer and semi-dualer, and fourth job just as Dual Blade....

My question: Which is correct as far as job names and skills????????4 years ago